https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 06 Oct 2026 14:01:45 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-291395 EUVD-2026-291395 https://cve.radiocsirt.org/vuln/euvd-2026-291395 https://cve.radiocsirt.org/vuln/fkie_cve-2026-33020 <p>libsixel is a SIXEL encoder/decoder implementation derived from kmiya&#39;s sixel. Versions 1.8.7 and prior contain an integer overflow which leads to a heap buffer overflow via sixel_frame_convert_to_rgb888() in frame.c, where allocation size and pointer offset computations for palettised images (PAL1, PAL2, PAL4) are performed using int arithmetic before casting to size_t. For images whose pixel count exceeds INT_MAX / 4, the overflow produces an undersized heap allocation for the conversion buffer and a negative pointer offset for the normalization sub-buffer, after which sixel_helper_normalize_pixelformat() writes the full image data starting from the invalid pointer, causing massive heap corruption confirmed by ASAN. An attacker providing a specially crafted large palettised PNG can corrupt the heap of the victim process, resulting in a reliable crash and potential arbitrary code execution. This issue has been fixed in version 1.8.7-r1.</p> <p>libsixel is a SIXEL encoder/decoder implementation derived from kmiya&#39;s sixel. Versions 1.8.7 and prior contain an integer overflow which leads to a heap buffer overflow via sixel_frame_convert_to_rgb888() in frame.c, where allocation size and pointer offset computations for palettised images (PAL1, PAL2, PAL4) are performed using int arithmetic before casting to size_t. For images whose pixel count exceeds INT_MAX / 4, the overflow produces an undersized heap allocation for the conversion buffer and a negative pointer offset for the normalization sub-buffer, after which sixel_helper_normalize_pixelformat() writes the full image data starting from the invalid pointer, causing massive heap corruption confirmed by ASAN. An attacker providing a specially crafted large palettised PNG can corrupt the heap of the victim process, resulting in a reliable crash and potential arbitrary code execution. This issue has been fixed in version 1.8.7-r1.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-33020 https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-33020 <p><strong>Affected:</strong> Ubuntu:16.04:LTS: libsixel, Ubuntu:18.04:LTS: libsixel, Ubuntu:20.04:LTS: libsixel, Ubuntu:22.04:LTS: libsixel, Ubuntu:24.04:LTS: libsixel, Ubuntu:25.10: libsixel, Ubuntu:26.04:LTS: libsixel</p> <p>libsixel is a SIXEL encoder/decoder implementation derived from kmiya&#39;s sixel. Versions 1.8.7 and prior contain an integer overflow which leads to a heap buffer overflow via sixel_frame_convert_to_rgb888() in frame.c, where allocation size and pointer offset computations for palettised images (PAL1, PAL2, PAL4) are performed using int arithmetic before casting to size_t. For images whose pixel count exceeds INT_MAX / 4, the overflow produces an undersized heap allocation for the conversion buffer and a negative pointer offset for the normalization sub-buffer, after which sixel_helper_normalize_pixelformat() writes the full image data starting from the invalid pointer, causing massive heap corruption confirmed by ASAN. An attacker providing a specially crafted large palettised PNG can corrupt the heap of the victim process, resulting in a reliable crash and potential arbitrary code execution. This issue has been fixed in version 1.8.7-r1.</p> <p><strong>Affected:</strong> Ubuntu:16.04:LTS: libsixel, Ubuntu:18.04:LTS: libsixel, Ubuntu:20.04:LTS: libsixel, Ubuntu:22.04:LTS: libsixel, Ubuntu:24.04:LTS: libsixel, Ubuntu:25.10: libsixel, Ubuntu:26.04:LTS: libsixel</p> <p>libsixel is a SIXEL encoder/decoder implementation derived from kmiya&#39;s sixel. Versions 1.8.7 and prior contain an integer overflow which leads to a heap buffer overflow via sixel_frame_convert_to_rgb888() in frame.c, where allocation size and pointer offset computations for palettised images (PAL1, PAL2, PAL4) are performed using int arithmetic before casting to size_t. For images whose pixel count exceeds INT_MAX / 4, the overflow produces an undersized heap allocation for the conversion buffer and a negative pointer offset for the normalization sub-buffer, after which sixel_helper_normalize_pixelformat() writes the full image data starting from the invalid pointer, causing massive heap corruption confirmed by ASAN. An attacker providing a specially crafted large palettised PNG can corrupt the heap of the victim process, resulting in a reliable crash and potential arbitrary code execution. This issue has been fixed in version 1.8.7-r1.</p> https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-33020